Install Nagios 3.5.0 when installing from source

Bug fixes:

    Fixed bug #403: The "configuration" page of the webui doesn't use
entity encoding when displaying the "command expansion" item (Eric
Stanley, Phil Randal)
    Fixed bug #424: Nagios Core 3.4.4 seg fault (core dump) on restart
after removing config for running service (Eric Stanley)
    Updated CGI utility functions to support UTF-8 characters (Eric
Stanley)
    Fixed bug where selecting Command Expansion from Configuration CGI
page would display commands instead (Eric Stanley)
    Fixed bug #369: status.cgi crashes with segfault when there are
german ulauts (äöüß) in the hostname or the servicename (Eric Stanley)
    Fixed bug #418: Scheduled Downtime Notifications Resent On Nagios
Restart/reload (Eric Stanley)
Merge pull request #146 from tas50/COOK-2613

COOK-2613: Install Nagios 3.5.0 when installing from source